The browser you are using is just partly supported, some features may not work, please use one of the latest Browsers (e.g Mozilla Firefox, Google Chrome, Microsoft Edge).
When the animation in the left top corner is bright and spinning fast, data that can be seen is loaded.
As soon as it turns gray and spinning slower, everything visible is loaded, now data is pre-loaded. This is helpful when working on slides with multiple Z-Indexes or time-indexes.
For touche-devices the following gestures are possible:
